Great part for your ar15 - KNS Precision Bolt Catch Retaining Pin for the AR15/M16 w/3 C-Clip Retainers

I mounted on my Anderson lower with no problem at all,I shot over 1000 rounds without any problems. when you mount on your lower make sure you snap the c clip onto the pin once it snaps on it won’t come off I use a miniature screwdriver to mount c clip, I’ve been taken my AR15 to the range over 6 month and the pin is still there and I fire 55-62 and even 70 grain without any issues I highly recommend great AR15 bolt catch I have them mounted on all of my 7 AR15.